Air filter



Patented Dec. 16, 1924. l

umrzn STATES PATENT OFFICE.

FRIEDRICH AUS DER MARK, OF ESSEN-ALTENESSE; GERMANY, ASSIGNOR T FIBM UTEK. & 'JE.E. MLLER GESELLSCHAFT MIT BESGHRNK'I'ER HAFTUNG, OIE BRAGKWEDE,

AIR FILTER.

T0 all whom z't mag conoem:

Be it known that L FRIEDRICH AUS DER MARK, acitizen of the GermanBepulolic, residing ab Essen-Altenessen, Germany,

haVe invented certain new und useful Im provements in Aii Filters (im?yvhich lL l1ave filed patent applicmhionin Germany Mrch 20, 1922), ofWhich the following is a specification.

and in particular 110 that dass. of air filters, comprising a plu'rality0f adjaeently a1- ranged flexible chain-like members, and in whiph thespace c0ntaining the dust 0r con- 1 taminated air is separated from thepure a:ir space by an endless chain 01 a plurality of linked individualmembers the several links of which constitute the filtering elements. Myinvention is intended to improve 2 1 the construction and operation 0f'devices 0f this kind, and in view thereof the invention refers t0 apeculiar configuration of the several small launinary platesconstituting the chain links, und. which are sus'pended in substantiallyParallel relation t0 the all eurrent to l0e treated.

In accordance with my invention the se small laminary plates areprovided with projections crbssing the direction 0f the eurrent, andforming obstructions loy means of which repeated deviatioh of tl1e pafch0f ehe current and a whirling efiect are produced, suchprojectionsconstituting pockets or troughs for collecting a suitablewetsing and dust retaining adhesive liquid, such as oils, glycerine erany other suitable liquids.

In case such link chain filters are so arranged as to rotate formingcirculaing filters immersing into a wet-ting liquid, the pockets formedby the;projections carry the wetting liquids upwards in tharising run 0fthe chain, and cause them to flow down in the descending run.

The projections are preferably V-shaped so as 130 allow the wettingliquid to collect in the receding angle thereof. Th height 0f thprojections above the plane of the several plates preferably correspondsto the 50 distance of the adjacent plates, and in a preferred form ofconstruction the arrangemeni: is such that the distarice between thendja'cent plates is determined by the shape of the projections referredto.

In a preferred modification the adjacent This invention has reference t0air-filt9rs,v

stance, it may be embodied in a plates a1e provided with their V-shapedprojections alternating through 180 degrees relatively to each other, sothat the V- sl1aped projections of one plate are crossing thecorresponding projections of the adjacent plate.

My invention Will be described with reference to the accompanyingdrawing,showing by way cf exarnple a preferred embodiment of theinvention in Figure 1 as a frnt view of a filter; Figure 2 is a sideview; Figure 3 is an elevation 0f 0ne of the small plate members withV-shaped projections; Figure 4: is an elevation of an adjacent platememloer showii1g how the V-shaped projections of the two plates arearranged at 180 degrees with relation t0 each other. Figure 5 shows achain link in side view.

In the dravvingz-S is tl1e dust aLir space, R is .the pure airspacewhich is sepafirate from the space S by a revolving or circulatin gfilter formed by an endless chain K. The air to be treated is assumed tofiow in the direction of the arrows indicated in Figure 2. The chain isshown supported l0y sprocket wheels 1, 1 and With its lower endimmersing into a container 0 charged with the wetting liquid. 7

'lhe filter illustrated in the dirawing by way 0f example is shown as anendless rotating cl1ain filter which upon its assage through thewetting' liquid takes up some 0f the liquid which is carried up in therising run 0f the chain und is caused t0 be dropped in the descendingrun. lt is t 0 be understood, however, that the invention is alsoapplicable to nnrotatingor Stationary filters of ehe chain Which isrinsed from above With the wetting liquid. In combination With theseknown constructions of filters my iniprovement Will 110W be described.

In accordance with my invention each chain link is formed by small'laminary plates a, b which 'are strung adjacently to each other by meanof holes e, forming a series 0f laminae upon the link bolts d of thechain. The laminae a, bare of exactly tl;e ame shap'e und provided withprojeotions or ribs f crosswise arranged with relation to the directionof the aufrent, und which in the construction shown by way of exampleconstitute a V. The pr ojections are p%eferably'stamped out of thematerial kind referred to, thus for in modifigations and cha'nges in its-parts and in the combinati'on thereof, so as ofthe plates, and formpockets 01' troughs for collecti'ng and for scooping up the wettingliquid in the receding angles cf the V. The portions pressed out cf theplane of each plate provide cdmplementary ribs and recesses at theopposite faces cf the platze, which bafile portions are preferablysymmetritzal with respect to a plane normal tothe plate at thelongitudinal axis thereof. The plabes are mounted adjacently to eachother on the li'nk bolts d in such a n'1anner that the V-shapedprojiections cf one plate are crossing those of the adjacent plate; sothat in the two adja'cent plates the p rojections f are arranged atright'angle t0 each other, as clearly appears from Figure 4. Inasmuch asthe plates are parallelly related to the direction of the air currentthe V- shaped projections forn1 obstructions against which the airimpinges and is repeatedly deviated from its course and whirled, whilethe V-shaped projections of the plates cf the rising run of the chainare scooping up the wetting liquid and carry it'upwards, und cause it toflow oif from the descending run. The baffle portions which extendalong'the plates in the general directionof, but at an angle to the airstream, may be conveniently defined as arranged at an angle to theentering and trailing edges of the plates, which edges are,respectively, those edges pres'cnted towards the incoming air stream andthose at which the air strcam leaves the plates. The projections ofeach-plate are in contact with the plane surfaces cf the adjacent plateso that the distance between two plates corresponds to the-xprojections.

The laminary"plates with the position of the V-shaped proje ctiqnscorresponding'to Figure 3, are indicated in Figure 5 at- I,

where II indicates the position 0f the V- shaped projectionscorresponding to Figure 4, so that it appears from Figure 5 how theplia.tes I and II are alternating with euch other.

The invention is susceptible of various several to better adapt theSame. to varying o;ondi tions, and witghout deviating from the spirit ofthe invention as pointed out in the claims.

I claim:

1. In an air filter comprising a plurality of plates -presented edgewiseto the air stream, baflies, between adjacent Pairs of plates definingpaths along the plates, said 'pathsincluding portions an=anged at ananglet0 each other and to the entering edges of said plates.

2. An air filter comprising a plurality of' plates presented edgewisetdthe air stream, each 0 said plates having portions ofiset fr0m theplane of the plate 110 provide complenientary ribs an recesses extendingalong said platze at an an le to the entering und trailing edges 'thereosaid plates being arrangecl t0 present theribbed face of one plate tothe recessed face of th e adjacent plate.

3. An air filter comprising a plurali ty 0f plates, each of said plateshaving a 1ibbed and a recessed face, said plate'zs being presentededgewise to the 3i1 streaxn ancl with the ribbed face of each platteprcscntd towards the recessed face cf the adjacent plate, the ribs andrecesses of the opposed faces of adjacent plates being arranged atanangle to euch other.

4. In an airfilter, a plurality 0f plateS disposed in parallel relationand ribshapd projeetions on the plates partly filling the inteispaces,said projections being generally V-shaped in elevation andsyinmetrically disposed relatively to a. plane transverse of thedirectioncf the air current.

5. In an air filter cf the endless chain type,

a chain the links of which are composed of 6. In an air filter 0f theendless ehain typ'e, a chain the links of which a1e com-' posed of aplurality-of .plaites in parallel relation, baflle portions provicled byribs und recesses eXtending along each of said links at the oppositefaces thereof 130 define tortuous paths for the air currents', thebaflle portions of eacl1 link heilig arranged at an angle to the edgestl1creof, and'the baflle portions at the cpposed fa'ces cf adjacentlinks being positi0ned at an angle t0 each other.

7. In an air filt'er of the end less chain type, a chain the links cfwhich am cum sed f plates in parallel relation and 1i shaped projectionson the plates cf each link partly filling the interspaces, saidprojections being generally V-shaped in eIevation und. symmetricall'ydisposed relatively to a plane normal t0 the links at the longitudinalthereof.

8. In an air lter, a, plurality of plates disposed in parallel relationund prvided with grooves in one surface defining corresponding ridges onthe opposite surface, said grooves und 1idges being generall)r V-shapedin elevation and symmetncally d1sposed relatively t0 a. plane transverseof the direction '0f the air currents.

9. An air filter, the dust-space cf which separated from the pure spaceby an endless chain, each chain link being composed of laminary platesstrung up 111 parallel relation to the flowing direction cf the air tebetreated and provided with projections crossing the air direction, theheight cf such projections corresponding 120 the. distance cf thelaminary plates from each other. 10. An air filter, the dust; space ofwhich '1s separated. from the pure air-space by an endless chain eachchain link being composed of laminary plates strung up in parallelrelation to the flowing direction of. the air to be treated and providedwith projeetions crossing the air direction, the height of suchprojections corresponding (o the distance cf the lanuinary plates fromeach other and forming pockets er troughs for receiving an adhesiveliquid for refiaining the dust.

11. An air-filter, the dust-space cf which is separated from the pureair space by an endless chain-; each chain link being composed cflaminary plates strung up in parallel relation to the flowing directionof the air tobe treated and provided with projections crossing the airdirection, the hexgllt ofsuch projec'tions corresponding to the distanceof the laminary plates from each other and forming V-shaped pockets 01"troughs for receii7ing an adhesive liquid for retaining the dust.

12. An air filter, the dust-space cf which is separated from the pureair-space by an endless chainl each chain link being composed cflaminary plate strung up in parallel relation to the flo ing directioi1of the air m be treated and provided with.

projectmns crossing the aiii'- direetie'n, the height cf suchprojections corresponding to the distanee of the laminar plates fromeaeh other and. fofming V-s aped pockets er troughs for receivin anadhe'sii e liquid for retaifling the dust, -t e V-shaped pockets 0Jg oneplatze being reversed witlgx respect t0 tl 1pe e;f the adjacent one.

l% air filter, the dust space of wh.ich

i's se p ma from lil}6 pure air speaceby an. endless chain,eachwhaindink in posed of 'laminary 'plates' presente edgecomwise to theair fiow, and having baflie portions extending along the platze and atan angle t0- the entering edge thereof and a cont;ainer for oil loeatedto serve as a bath through which the chain travels;

14. An air filter, the dust space cf which is separated from tl1e pureair space by an endless chain each chain link bein'g composed cfmultiple laminary plates strung up in parallel relation, and providedwith projections extending into' the interspaces, said projectionsextending along the plates at an angle to the direcfiion of air flow, anumber cf the projections cf each plate Being 0f suificient height tocontact with the opposed face of the adjacent plate, and a container foroil located to senfe as a bath through which the chain travels.

#15. An air filter, the dustspace of which is separated from the pureair space by an endless chain, each chain link being compos ed oflaminary plates strung up in. parallel 'relation t0 the flowingdirection cf the air to be treate'd, the opposed faces of adjacenfiplates being provided, respectively, with ribs and 1eees'ses arranged atan angle to each other and crossing the air direction, and a containe1for oil located t0 serve as a. bath through Which the chain tiaVels.

16. A sheet metal air filter' having V-shaped baflies struck up from themain body of the sheet metal in the path 0f the air to be filtered, andmeans to supply liquid 150 the surface cf the sheet metal tc render itadhesively reten'tive f0r dust particles andalso t0 washofl' the dust asit settl'es on said sheet metal. 4

17. An endless self cleaning air filter disposed across the airpassageway,-saidfilter having tortuous flues forthe air, said fluesture'.

FRIEDRICH AUS mm MARK.

